Kohana Credit Card Pre-Authorisation Payment Driver

Kohana comes with a payment module with various payment drivers. Here is a payment driver for credit card pre authorisation…

config/payment.php

$config['Creditcard'] = array
(
 'driver'        => 'Creditcard',
);

and the payment driver…

<?php defined('SYSPATH') OR die('No direct access allowed.');
/**
 * Creditcard Payment Driver
 *
 *
 * @author     Sakib Farid
 */
class Payment_Creditcard_Driver implements Payment_Driver
{
 // Fields required to do a transaction
 private $required_fields = array
 (
 'card_num'         => false,
 //format mmyy
 'exp_date'         => false,
 );

 private $fields = array(
 'card_num'=>'',
 //format mmyy
 'exp_date'=>'',
 'cvv'=>'',
 //format mmyy
 'start_date',
 'issue_num',
 );

 private $cc_expiry_month;
 private $cc_expiry_year;
 /**
 * Sets the config for the class.
 *
 * @param  array  config passed from the library
 */
 public function __construct($config)
 {
 Kohana::log('debug', 'Creditcard Payment Driver Initialized');
 }

 public function set_fields($fields)
 {
 foreach ((array) $fields as $key => $value)
 {
 $this->fields[$key] = $value;
 if (array_key_exists($key, $this->required_fields) and !empty($value)) $this->required_fields[$key] = true;
 }
 }

 public function process()
 {
 // Check for required fields
 if (in_array(false, $this->required_fields))
 {
 $fields = array();
 foreach ($this->required_fields as $key => $field)
 {
 if (!$field) $fields[] = $key;
 }
 return 'required_fields';
 }

 $this->fields['card_num'] = ereg_replace('[^0-9]', '', $this->fields['card_num']);

 if (ereg('^4[0-9]{12}([0-9]{3})?$', $this->fields['card_num'])) {
 $_SESSION['cc_type'] = 'Visa';
 } elseif (ereg('^5[1-5][0-9]{14}$', $this->fields['card_num'])) {
 $_SESSION['cc_type'] = 'Master Card';
 //} elseif (ereg('^3[47][0-9]{13}$', $this->card_num)) {
 //  $_SESSION['cc_type'] = 'American Express';
 } elseif (ereg('^3(0[0-5]|[68][0-9])[0-9]{11}$', $this->fields['card_num'])) {
 $_SESSION['cc_type'] = 'Diners Club';
 } elseif (ereg('^6011[0-9]{12}$', $this->fields['card_num'])) {
 $_SESSION['cc_type'] = 'Discover';
 } elseif (ereg('^(3[0-9]{4}|2131|1800)[0-9]{11}$', $this->fields['card_num'])) {
 $_SESSION['cc_type'] = 'JCB';
 } elseif (ereg('^5610[0-9]{12}$', $this->fields['card_num'])) {
 $_SESSION['cc_type'] = 'Australian BankCard';
 } elseif (ereg('((^(4903|4905|4911|4936|6333|6759)([0-9]{12}|[0-9]{14}|[0-9]{15}))|(^(564182|633110)([0-9]{10}|[0-9]{12}|[0-9]{13})))$', $this->fields['card_num'])) {
 $_SESSION['cc_type'] = 'Switch Debit Card';
 } else {
 //unknown card number
 return -1;
 }

 $expiry_m = substr($this->fields['exp_date'], 0, 2);

 if (is_numeric($expiry_m) && ($expiry_m > 0) && ($expiry_m < 13)) {
 $this->cc_expiry_month = $expiry_m;
 } else {
 //expiry month is invalid
 return -2;
 }

 $current_year = date('Y');
 $expiry_y = substr($this->fields['exp_date'], 2);
 $expiry_y = substr($current_year, 0, 2) . $expiry_y;
 if (is_numeric($expiry_y) && ($expiry_y >= $current_year) && ($expiry_y <= ($current_year + 10))) {
 $this->cc_expiry_year = $expiry_y;
 } else {
 //invalid expiry year
 return -3;
 }

 if ($expiry_y == $current_year) {
 if ($expiry_m < date('n')) {
 //invalid expiry date, not in future
 return -4;
 }
 }

 $cardNumber = strrev($this->fields['card_num']);
 $numSum = 0;

 for ($i=0; $i<strlen($cardNumber); $i++) {
 $currentNum = substr($cardNumber, $i, 1);

 // Double every second digit
 if ($i % 2 == 1) {
 $currentNum *= 2;
 }

 // Add digits of 2-digit numbers together
 if ($currentNum > 9) {
 $firstNum = $currentNum % 10;
 $secondNum = ($currentNum - $firstNum) / 10;
 $currentNum = $firstNum + $secondNum;
 }

 $numSum += $currentNum;
 }

 // If the total has no remainder it's OK
 if ($numSum % 10 == 0) {
 return true;
 } else {
 //hasnt passed pre-authorisation
 return -5;
 }
 }

}

You must ofcourse create any forms you require.

Visit the Kohana website for more information on the payment module.

Tags: credit card, Kohana, payment driver, payment module, php, PHP Framework, pre-authorisation